Sauk County Demographics

A map of Sauk County's Population by Race

Sauk County, Wisconsin has an estimated population of 66,009, a less than 1% change from the 65,763 recorded in the 2020 Census. The population is 86.3% White, 6.8% Hispanic, 4.4% Multiracial, 1.3% Native American/Other, 0.8% Black, and 0.4% Asian. This demographic dot map shows the population of Sauk County, with one dot drawn for each person counted by the Census, color-coded by race.

Sauk has become more racially diverse since the 2020 Census. It is considerably less diverse than Wisconsin overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Sauk County, that probability was 22.1% in 2020 and 24.9% in the most recent ACS estimates.

Sauk County is ranked the 25th most populous county in Wisconsin, out of 72 counties. Sauk County was ranked the 25th most populous county in the 2020 Census.

Sauk County's White Population

56,960 residents of Sauk County, or 86.3% of the population, identify as White. The share of White residents in Sauk County is higher than in Wisconsin overall, where 78.6% of the population is White. Sauk County ranks 42nd statewide in terms of White residents as a share of the population, out of 72 counties.

Since the 2020 Census, Sauk County's White population has declined by an estimated 1.6%. White residents' share of Sauk County's population has decreased from 88.0% to 86.3%.

Sauk County is less White than neighboring Iowa County (92.4% White), Richland County (92.1% White), Juneau County (87.4% White), Adams County (87.6% White), and Columbia County (90.3% White).

Sauk County's Black Population

511 residents of Sauk County, or 0.8% of the population, identify as Black. The share of Black residents in Sauk County is lower than in Wisconsin overall, where 5.9% of the population is Black. Sauk County ranks 33rd statewide in terms of Black residents as a share of the population, out of 72 counties.

Since the 2020 Census, Sauk County's Black population has declined by an estimated 11.6%. Black residents' share of Sauk County's population has remained roughly unchanged at 0.8%.

Sauk County is more Black than neighboring Richland County (0.3% Black). Sauk County is less Black than neighboring Juneau County (2.3% Black), Adams County (2% Black), and Columbia County (1.6% Black).

Sauk County's Asian Population

296 residents of Sauk County, or 0.4% of the population, identify as Asian. The share of Asian residents in Sauk County is slightly lower than in Wisconsin overall, where 2.9% of the population is Asian. Sauk County ranks 33rd statewide in terms of Asian residents as a share of the population, out of 72 counties.

Since the 2020 Census, Sauk County's Asian population has declined by an estimated 24.9%. Asian residents' share of Sauk County's population has remained roughly unchanged at 0.4%.

Sauk County is less Asian than neighboring Iowa County (0.9% Asian), Richland County (0.9% Asian), Juneau County (0.6% Asian), Adams County (0.6% Asian), and Columbia County (0.8% Asian).

Sauk County's Hispanic Population

4,488 residents of Sauk County, or 6.8% of the population, identify as Hispanic. The share of Hispanic residents in Sauk County is comparable to the share in Wisconsin overall, where 8% of the population is Hispanic. Sauk County ranks 14th statewide in terms of Hispanic residents as a share of the population, out of 72 counties.

Since the 2020 Census, Sauk County's Hispanic population has grown by an estimated 10.8%. Hispanic residents' share of Sauk County's population has increased from 6.2% to 6.8%.

Sauk County is more Hispanic than neighboring Iowa County (2.3% Hispanic), Richland County (3.3% Hispanic), Juneau County (3% Hispanic), Adams County (4.4% Hispanic), and Columbia County (4.1% Hispanic).

Sauk County's Native American/Other Population

849 residents of Sauk County, or 1.3% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Sauk County is comparable to the share in Wisconsin overall, where 0.9% of the population is Native American/Other. Sauk County ranks 19th statewide in terms of Native American/Other residents as a share of the population, out of 72 counties.

Since the 2020 Census, Sauk County's Native American/Other population has declined by an estimated 8.4%. Native American/Other residents' share of Sauk County's population has remained roughly unchanged at 1.3%.

Sauk County is more Native American/Other than neighboring Iowa County (0.4% Native American/Other), Richland County (0.6% Native American/Other), Juneau County (1% Native American/Other), Adams County (1% Native American/Other), and Columbia County (0.6% Native American/Other).

Sauk County's Multiracial Population

2,905 residents of Sauk County, or 4.4% of the population, identify as Multiracial. The share of Multiracial residents in Sauk County is comparable to the share in Wisconsin overall, where 3.7% of the population is Multiracial. Sauk County ranks 40th statewide in terms of Multiracial residents as a share of the population, out of 72 counties.

Since the 2020 Census, Sauk County's Multiracial population has grown by an estimated 49.3%. Multiracial residents' share of Sauk County's population has increased from 3.0% to 4.4%.

Sauk County is more Multiracial than neighboring Iowa County (3.3% Multiracial), Richland County (2.8% Multiracial), Adams County (4.3% Multiracial), and Columbia County (2.6% Multiracial). Sauk County is less Multiracial than neighboring Juneau County (5.9% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.